Sökresultat

Filtyp

Din sökning på "*" gav 533093 sökträffar

The light-yield response of a NE-213 liquid-scintillator detector measured using 2–6 MeV tagged neutrons

The response of a NE-213 liquid-scintillator detector has been measured using tagged neutrons from 2 to 6 MeV originating from an Am/Be neutron source. The neutron energies were determined using the time-of-flight technique. Pulse-shape discrimination was employed to discern between gamma-rays and neutrons. The behavior of both the fast (35 ns) and the combined fast and slow (475 ns) components of

Creating a safe haven-women's experiences of the midwife's professional skills during planned home birth in four Nordic countries

OBJECTIVE: The midwife assisting a birth has a considerable influence on the woman's experience of the birth. The aim of this study was to investigate the experience of the midwife's professional skills among women in Norway, Denmark, Iceland, and Sweden who chose a planned home birth.DESIGN AND SETTING: All known home birth midwives were asked to inform the mothers about the project and invite th

Clinical application of a microcomputer system for analysis of monophasic action potentials

UNLABELLED: Computerized analysis of monophasic action potentials (MAPs) has rarely been reported in clinical setting. We developed a computer system featuring on-line acquisition and user-monitored automatic measurement of multichannel MAPs with the capability of manual corrections. This system has been used in 34 patients in whom two-channel MAPs and 1-lead ECG were digitized during sinus rhythm

Effect of dofetilide on cardiac repolarization in patients with ventricular tachycardia. A study using simultaneous monophasic action potential recordings from two sites in the right ventricle

Monophasic action potentials (MAP) were simultaneously recorded from the right ventricular (RV) apex (RVA) and the outflow tract (RVOT) before and after an infusion of dofetilide in 10 patients with documented ventricular tachycardia. After the drug infusion, the MAP duration (MAPd), repolarization time, and corrected QT interval were significantly prolonged during sinus rhythm, RV pacing, and RV

Population-based study of survival for women with serous cancer of the ovary, fallopian tube, peritoneum or undesignated origin - on behalf of the Swedish gynecological cancer group (SweGCG)

Objective: The aim of the study was to determine survival outcome in patients with serous cancer in the ovary, fallopian tube, peritoneum and of undesignated origin. Methods: Nation-wide population-based study of women. ≥. 18. years with histologically verified non-uterine serous cancer, included in the Swedish Quality Registry for primary cancer of the ovary, fallopian tube and peritoneum diagnos

Säg mig hur de klarade första året och jag skall säga dig hur många som kommer att ta examen

Det är inte alla teknologer som antas till en civilingenjörsutbildning som verkligen tar examen. Vid LTH har, till exempel, bara var tionde teknolog tagit examen inom den nominella tiden 4.5 år. Inte förrän efter 6 år har hälften tagit examen och efter 15 år är det fortfarande en tredjedel av dem som en gång antogs som saknar examen. Inspirationen till denna studie var behovet att försöka hitta nåDet är inte alla teknologer som antas till en civilingenjörsutbildning som verkligen tar examen. Vid LTH har, till exempel, bara var tionde teknolog tagit examen inom den nominella tiden 4.5 år. Inte förrän efter 6 år har hälften tagit examen och efter 15 år är det fortfarande en tredjedel av dem som en gång antogs som saknar examen. Inspirationen till denna studie var behovet att försöka hitta nå

WNT5A signaling impairs breast cancer cell migration and invasion via mechanisms independent of the epithelial-mesenchymal transition

Background: WNT5A (-/-) mammary tissue has been shown to exhibit increased ductal elongation, suggesting elevated mammary cell migration. Increased epithelial cell migration/invasion has often but not always been linked to the epithelial-mesenchymal transition (EMT). In the current study, we investigated the loss of WNT5A in HB2 human mammary epithelial cells and hypothesized that this loss increa

Development after pediatric brain tumor-a longitudinal study

Background: Patients treated for Pediatric Brain Tumors (PBTs) often experience a decline/stagnation in their cognitive functioning.Anumber of potential risk factors for cognitive decline have been identified including gender (female), young age-at-diagnosis, higher baseline IQ, hydrocephalus at diagnosis, treatment with Whole Brain Radiation Therapy (WBRT), and larger radiation field and/or dose.

High-contrast imaging through scattering media using structured illumination and Fourier filtering

We show in this Letter a novel approach for high-contrast imaging through scattering media by combining structured illumination and Fourier filtering (SIF). To assess the image contrast enhancement at different image spatial frequencies, the modulation transfer function is calculated for four detection schemes: (1) no filtering, (2) Fourier filtering, (3) structured illumination, and (4) SIF filte

Threshold π - production on the deuteron

An experiment that aims to measure the π- photoproduction cross-section σ(E) on the deuteron γ + 2H → π- + 2p near threshold is discussed. The main concepts of the experimental technique are presented alongside some preliminary signals.

On a fixed-point algorithm for structured low-rank approximation and estimation of half-life parameters

We study the problem of decomposing a measured signal as a sum of decaying exponentials. There is a direct connection to sums of these types and positive semi-definite (PSD) Hankel matrices, where the rank of these matrices equals the number of exponentials. We propose to solve the identification problem by forming an optimization problem with a misfit function combined with a rank penalty functio

Longitudinal changes in CSF alpha-synuclein species reflect Parkinson's disease progression

Background: Parkinson's disease (PD) diagnosis is mainly based on clinical criteria, with a high risk of misdiagnosis. The identification of reliable biomarkers for disease diagnosis and progression has a key role for developing disease-modifying therapies. In this article, we investigated the longitudinal changes of CSF α-synuclein species in early PD patients and explored the potential use of th

Characterisation of a flavonoid ligand of the fungal protein Alt a 1

Spores of pathogenic fungi are virtually ubiquitous and cause human disease and severe losses in crops. The endophytic fungi Alternaria species produce host-selective phytotoxins. Alt a 1 is a strongly allergenic protein found in A. alternata that causes severe asthma. Despite the well-established pathogenicity of Alt a 1, the molecular mechanisms underlying its action and physiological function r